Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c93c98a7cf95a072d1c22b420fe2818a78bff75a786705a916f91ae4feb1f87' 
  AND token = 'iJHknpIP73ZUX09Mw2ukoypmMFkdy1CZ3qKc43UZhH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}